use serde::de::Visitor;
use serde::ser::{Serialize, Serializer};
use serde::{Deserialize, Deserializer};
use std::error::Error as StdError;
use std::fmt::{self, Debug, Display};
use std::io;
use std::sync::PoisonError;

pub type Result<T> = std::result::Result<T, Error>;

/**
*description:系统通用错误定义
*author:cassie-lxd<348040933@qq.com>
*/
#[derive(Debug)]
#[non_exhaustive]
pub enum Error {
  /// Default Error
  E(String),
  ErrorUnauthorized(String),
}

impl<T> std::convert::From<PoisonError<T>> for Error {
  fn from(arg: PoisonError<T>) -> Self {
    Error::E(arg.to_string())
  }
}

impl Display for Error {
  // IntellijRust does not understand that [non_exhaustive] applies only for downstream crates
  // noinspection RsMatchCheck
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Error::E(error) => write!(f, "{}", error),
      Error::ErrorUnauthorized(error) => write!(f, "{}", error),
    }
  }
}

impl StdError for Error {}

impl From<io::Error> for Error {
  #[inline]
  fn from(err: io::Error) -> Self {
    Error::from(err.to_string())
  }
}

impl From<&str> for Error {
  fn from(arg: &str) -> Self {
    return Error::E(arg.to_string());
  }
}

impl From<std::string::String> for Error {
  fn from(arg: String) -> Self {
    return Error::E(arg);
  }
}

impl From<&dyn std::error::Error> for Error {
  fn from(arg: &dyn std::error::Error) -> Self {
    return Error::E(arg.to_string());
  }
}

impl From<Error> for std::io::Error {
  fn from(arg: Error) -> Self {
    arg.into()
  }
}

impl Clone for Error {
  fn clone(&self) -> Self {
    Error::from(self.to_string())
  }

  fn clone_from(&mut self, source: &Self) {
    *self = Self::from(source.to_string());
  }
}

// This is what #[derive(Serialize)] would generate.
impl Serialize for Error {
  fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
  where
    S: Serializer,
  {
    serializer.serialize_str(self.to_string().as_str())
  }
}

struct ErrorVisitor;

impl<'de> Visitor<'de> for ErrorVisitor {
  type Value = String;

  fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
    formatter.write_str("a string")
  }

  fn visit_string<E>(self, v: String) -> std::result::Result<Self::Value, E>
  where
    E: std::error::Error,
  {
    Ok(v)
  }

  fn visit_str<E>(self, v: &str) -> std::result::Result<Self::Value, E>
  where
    E: std::error::Error,
  {
    Ok(v.to_string())
  }
}

impl<'de> Deserialize<'de> for Error {
  fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
  where
    D: Deserializer<'de>,
  {
    let r = deserializer.deserialize_string(ErrorVisitor)?;
    return Ok(Error::from(r));
  }
}
